Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 207)

AN93
Rev. 1.3 207
AT+VSM=4 OK
Select G.711U
-law PCM, 8-bit, 64 kbps
format. The voice driver will need to track
the OGM format with the OGM PCM file.
AT+VTX CONNECT Trigger transmit operation.
TX Underrun. Appears at the start of +VTX
before transmit data are seen.
[Voice Stream]
Transmit OGM voice stream. During voice
stream capture, the user can adjust the UB8
value via the and
commands. The host voice driver will need
track the number of adjustments and update
the +VGT value for future use.
OK
Terminate the transmit operation. The
modem will respond with OK to denote the
return to command mode.
AT:U199|A OK
Mute the microphone and speaker paths to
the codec.
AT:U72,0108 OK
Configure Si3000 Register 1:
Disable speaker driver
Enable line output driver
Disable telephone instrument driver
Disable MBIAS output
AT:U72,05D7 OK
Configure Si3000 Register 5:
20 dB Line In gain
Enable Line In
20 dB MIC input gain
Mute MIC input
Mute telephone instrument input
Enable IIR filter
AT:U72,065E OK
Configure Si3000 Register 6:
0 dB RX PGA gain
Enable Line Out
Disable telephone instrument output
AT:U72,075E OK
Configure Si3000 Register 7:
0 dB RX PGA gain
Enable SPKRL
Mute SPKRR
AT:U72,0900 OK
Configure Si3000 Register 9:
0 dB Line Out attenuation
0 dB Speaker output attenuation
AT:U199&FFF7 OK
Enable speaker for local ring tone/alert
tones.
Table 130. TAM Handset Review OGM (Continued)